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IllegalArgumentException: Unable to instantiate service for Class 'org.drools.compiler.BPMN2ProcessProvider'
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created by <a href="https://community.jboss.org/people/mutou">mutou wang</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/737590#737590">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hello, everyone!</p><p>When I was running the java sentences:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>     KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();</p><p>     kbuilder.add(ResourceFactory.newFileResource(filename), ResourceType.BPMN2);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>the second line throws a IIIlegalArgumentException like this:</p><p>java.lang.IllegalArgumentException: Unable to instantiate service for Class 'org.drools.compiler.BPMN2ProcessProvider' at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:161) </p><p>at org.drools.compiler.BPMN2ProcessFactory.loadProvider(BPMN2ProcessFactory.java:29) </p><p>at org.drools.compiler.BPMN2ProcessFactory.getBPMN2ProcessProvider(BPMN2ProcessFactory.java:21) </p><p>at org.drools.compiler.BPMN2ProcessFactory.configurePackageBuilder(BPMN2ProcessFactory.java:12) </p><p>at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:607)</p><p> at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:37) </p><p>at org.thgrid.robinia.executor.impl.JbpmInstance.readKnowledgeBase(JbpmInstance.java:85)</p><p> at org.thgrid.robinia.executor.impl.JbpmInstance.doIt(JbpmInstance.java:64)</p><p> at org.thgrid.robinia.executor.impl.AbstractInstance.run(AbstractInstance.java:154) </p><p>at org.thgrid.robinia.event.CallbackEventHandler.handle(CallbackEventHandler.java:11)</p><p> at org.thgrid.robinia.event.EventProcessThread.handleEvent(EventCenter.java:67) </p><p>at org.thgrid.robinia.event.EventProcessThread.run(EventCenter.java:45)</p><p> Caused by: java.lang.IllegalArgumentException: Unable to instantiate 'org.jbpm.bpmn2.BPMN2ProcessProviderImpl' at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:210)</p><p> at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.call(ServiceRegistryImpl.java:202) </p><p>at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:159) </p><p>... 11 more </p><p>Caused by: java.lang.ClassNotFoundException: org.jbpm.bpmn2.BPMN2ProcessProviderImpl at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680) </p><p>at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526) </p><p>at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) </p><p>at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:207) ... 13 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I debuged this program for days and search the Internet for solutions, but in vain.</p><p>How could this Exceptions happen?</p><p>And What should I do to solve this problem??</p><p>Thank you!!</p></div>
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